Difference between revisions of "Machaeranthera Nees (Q2271)"
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Latest revision as of 12:51, 24 June 2022
Machaeranthera is a taxon with the rank genus within the tribe Astereae
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Machaeranthera Nees
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Machaeranthera is a taxon with the rank genus within the tribe Astereae
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taxon/id/Machaeranthera Nees
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Machaeranthera Nees
Machaeranthera
Nees
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 20: Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford University Press, New York.
accepted
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Stems erect, much branched (when well developed), moderately to densely hairy, usually stipitate-glandular.
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blades lanceolate to elliptic, pinnatifid, 2-pinnatifid, deeply lobed, or dissected (lobes aristate), ultimate margins entire, faces moderately to densely hairy, stipitate-glandular.
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Heads radiate, borne singly (on leafy peduncles 5–30 mm).
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Involucres broadly turbinate to hemispheric, (5–11 ×) 10–18 mm.
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Phyllaries 24–80 (–100) in 3–6 series, appressed, spreading, or reflexed, 1-nerved (flat to keeled), lanceolate to linear, unequal, bases ± indurate, apices herbaceous, margins not scarious, faces proximally glabrous, distally moderately to densely hairy, stipitate-glandular.
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Receptacles flat to convex, pitted, epaleate.
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Ray-florets 8–40 (–50), pistillate, fertile;
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corollas blue, violet, or purple.
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Disc-florets 14–160, bisexual, fertile;
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corollas yellow, tubes shorter than funnelform throats, lobes 5, erect, deltate to lanceolate;
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style-branch appendages lanceolate.
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Cypselae narrowly to broadly obovoid, slightly compressed, 8–18-ribbed, faces sparsely to densely hairy (hairs antrorse or appressed);
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pappi persistent, of 30–80 white to tawny, barbellate, apically attenuate bristles in 1–3 series.
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lanceolate
elliptic pinnatifid 2-pinnatifid deeply lobed or dissected
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lanceolate
elliptic pinnatifid 2-pinnatifid deeply lobed or dissected
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lanceolate
elliptic pinnatifid 2-pinnatifid deeply lobed or dissected
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lanceolate
elliptic pinnatifid 2-pinnatifid deeply lobed or dissected
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lanceolate
elliptic pinnatifid 2-pinnatifid deeply lobed or dissected
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distally moderately; moderately to densely
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